fix: use Link + router.refresh() for optimal navigation

Based on Next.js best practices research:
- Use <Link> component for prefetching and client-side navigation
- Add router.refresh() onClick to force server component re-render
- This preserves SPA experience while ensuring fresh data
- Fixes issue where pages don't reload after URL change

components/sidebar-history-item.tsx

@@ -1,4 +1,7 @@
+"use client";
+
 import Link from "next/link";
+import { useRouter } from "next/navigation";
 import { memo } from "react";
 import { useChatVisibility } from "@/hooks/use-chat-visibility";
 import type { Chat } from "@/lib/db/schema";
@@ -37,6 +40,7 @@ const PureChatItem = ({
   onDelete: (chatId: string) => void;
   setOpenMobile: (open: boolean) => void;
 }) => {
+  const router = useRouter();
   const { visibilityType, setVisibilityType } = useChatVisibility({
     chatId: chat.id,
     initialVisibilityType: chat.visibility,
@@ -45,7 +49,13 @@ const PureChatItem = ({
   return (
     <SidebarMenuItem>
       <SidebarMenuButton asChild isActive={isActive}>
-        <Link href={`/chat/${chat.id}`} onClick={() => setOpenMobile(false)}>
+        <Link 
+          href={`/chat/${chat.id}`} 
+          onClick={() => {
+            setOpenMobile(false);
+            router.refresh();
+          }}
+        >
           <span>{chat.title}</span>
         </Link>
       </SidebarMenuButton>

components/top-navbar.tsx

@@ -174,21 +174,15 @@ export function TopNavbar({
         )}
 
         {/* AI智能精选 */}
-        <Button
-          variant="ghost"
-          size="sm"
-          className="flex items-center gap-1 h-8 px-3 text-white hover:bg-white/15 hover:text-white rounded-full transition-colors"
-          onClick={(e) => {
-            e.preventDefault();
-            e.stopPropagation();
-            router.push("/featured");
-          }}
-          type="button"
+        <Link
+          href="/featured"
+          className="flex items-center gap-1 h-8 px-3 text-white hover:bg-white/15 hover:text-white rounded-full transition-colors text-sm font-medium"
           title="AI智能精选"
+          onClick={() => router.refresh()}
         >
           <Sparkles className="h-4 w-4 text-yellow-400" />
-          <span className="text-sm font-medium">AI精选</span>
-        </Button>
+          <span>AI精选</span>
+        </Link>
 
         {/* 精选榜单 */}
         <DropdownMenu open={rankingOpen} onOpenChange={setRankingOpen}>
@@ -259,39 +253,30 @@ export function TopNavbar({
         </Button>
 
         {/* 无限画布 */}
-        <Button
-          variant="ghost"
-          size="sm"
-          className="flex items-center gap-1 h-8 px-3 text-white hover:bg-white/15 hover:text-white rounded-full transition-colors"
-          onClick={(e) => {
-            e.preventDefault();
-            e.stopPropagation();
+        <button
+          className="flex items-center gap-1 h-8 px-3 text-white hover:bg-white/15 hover:text-white rounded-full transition-colors text-sm font-medium"
+          onClick={() => {
             const newId = crypto.randomUUID();
             router.push(`/canvas/${newId}`);
+            router.refresh();
           }}
           type="button"
           title="无限画布"
         >
           <LayoutGrid className="h-4 w-4 text-purple-400" />
-          <span className="text-sm font-medium">无限画布</span>
-        </Button>
+          <span>无限画布</span>
+        </button>
 
         {/* 我的图册 */}
-        <Button
-          variant="ghost"
-          size="sm"
-          className="flex items-center gap-1 h-8 px-3 text-white hover:bg-white/15 hover:text-white rounded-full transition-colors"
-          onClick={(e) => {
-            e.preventDefault();
-            e.stopPropagation();
-            router.push("/gallery");
-          }}
-          type="button"
+        <Link
+          href="/gallery"
+          className="flex items-center gap-1 h-8 px-3 text-white hover:bg-white/15 hover:text-white rounded-full transition-colors text-sm font-medium"
           title="我的图册"
+          onClick={() => router.refresh()}
         >
           <Images className="h-4 w-4" />
-          <span className="text-sm font-medium">我的图册</span>
-        </Button>
+          <span>我的图册</span>
+        </Link>
 
         {/* 分隔线 (如果有链接或图册按钮，且是管理员) */}
         {isAdmin && (
@@ -300,20 +285,14 @@ export function TopNavbar({
 
         {/* 系统设置（仅管理员可见）*/}
         {isAdmin && (
-          <Button
-            variant="ghost"
-            size="sm"
-            className="h-8 w-8 p-0 text-white hover:bg-white/15 hover:text-white rounded-full"
-            onClick={(e) => {
-              e.preventDefault();
-              e.stopPropagation();
-              router.push("/settings");
-            }}
-            type="button"
+          <Link
+            href="/settings"
+            className="flex items-center justify-center h-8 w-8 text-white hover:bg-white/15 hover:text-white rounded-full"
             title="系统设置"
+            onClick={() => router.refresh()}
           >
             <Settings className="h-4 w-4" />
-          </Button>
+          </Link>
         )}
       </div>